Evaporating apparatus.



J. H. FEDELER.

EVAPORATiNG APPARATUS.

APPLICATION FILED NOV. 26, 1909- REHEWED JUNE 9. I916.

Patented Jan. 16, 1917.

2 SHEETSSHEET I.

J. -H. FEDELER.

EVAPORATING APPARATUS.

APPLICATION FILED NOV. 26. 1909. RENEWED JUNE 9.1916.

Patented Jan. 16, 1917.

2 SHEETS-SHEET 2.

JOHN H. FEDELER, OF NEW YORK, N. Y.

EVAPORATING APPARATUS.

Application filed November 26, 1909, Serial No. 530,049.

' To all whom it may concern:

Be it known that I, JOHN H. Fnnnnnn, a citizen of the United States, and a resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Evaporating Apparatus, of which the following is a specification.

My invention relates to new and useful improvements in evaporating apparatus and the objeci of the invention is to provide means for evaporating fluids at a low temperature for the purpose of separating solid particles from liquids which may contain the same.

The invention consists in the improvements to be fully described hereinafter, and the novelty of which will be particularly pointed out and distinctly claimed.

I have fully and clearly illustrated one form of the invention in the accompanying drawings to be taken as a part of this specification and wherein:

Figure 1 is a view in side elevation of a. structure embodying the invention. Fig. 2 is a view similar to that shown in Fig. l with parts broken away in order to illustrate the internal parts of the apparatus. Fig. 3 is a section on the line 33 of Fig. 1. Fig. 4 is a detail View in side elevation partly in section of a manifold duct employed in connection with the apparatus. Fig. 5 is an inner face view of a section of the heater and air circulating means. Fig. 6 is a transverse section taken through the structure shown in Fig. 5; and Fig. 7 is amodified form of the structure shown in Figs. 5 and 6.

Referring to the drawings by characters of reference, C designates a revoluble carrier having a cylindrical outer surface to receive the fluid body to be evaporated, said carrier being preferably in the form of a flanged pulley, and the same is arranged to revolve in suitablebearings C and to be driven by any suitable means, not shown, said driving means being preferably of a form such that the speed of revolution of "the carrier may be regulated. This carrier C-is inclosed w1th1n a cylindrical shell S,

and means is provided in connection with this shell for heating the perlphery of the carrier and passing a current of air over the same in order to accomplish the evaporation of the fluid on the carrier.

Specification of Letters Patent.

Patented Jan. 16, 1917.

Renewed June 9, 1916. Serial No. 102,795.

The heating means preferably consists of an annular chamber H formed between the electric bulbs N therein, as shown in Fig. 7,

the latter beingparticularly advantageous when milk is the fluid to be evaporated, as

the rays from an electric bulb will destroy certain germs and at the same time supply the necessary heat. The evaporation is performed by the heat in this heater H, together with a supply of air caused to circulate or pass over the surface of the liquid on the carrier.

I will now proceed -to describe the means whereby a supply of air is directed over the surface of the liquid on the carrier, this means constituting one of the important features of my invention.

Referring particularly to Figs. 5 and 6, it will be noted that the inner wall of the beater H,.or that wall which is adjacent the surface of the carrier C, is provided with a plurality of inwardly directed fins or partitions R, R R and R attached at one edge to said Wall and at their inner ends closely approaching the cylindrical surface of the carrier C. These fins are preferably in the form of fiat plates which are staggered relative to each other so that air supplied between said fins, for instance, at the supply D, will be caused to take a circuitous path back and forth transversely of the cylindrical surface of the carrier C, as indicated by arrows in Fig. 5. By reference to Fig. 5, in. which is illustrated one unit or set of said fins or plates, it will be noted that the outer fins R extend substantially across the entire width of the inner wall of the heater and that between these fins R are arranged parallel fins R the latter at their outer ends on each side of the wall H being joined by walls R but being separated at their inner ends, as clearly shown in Fig. 5. As shown in Fig. 5, I preferably employ in each unit three of these fins R separated fromeach other in parallel relation, and between the same are arranged transverse fins R which bridge the spaces between the inner ends of said fins R but stop short of the walls R so that air admitted at the point D between the fins R will be forced to flow outwardly and then inwardly to the spaces between the inner ends of the fins R whence it again flows outwardly and escapes over the edge of the cylindrical carrier, as indicated by the arrows in Fig. 5.

I do not desire to be limited to the particular form of the means for directing the current of air, but the one described eiiicicntly-accomplishes the desired result. It will be understood that some of the air will, of course, leak between the. fins or plates and the carrier, as there is a small space between the inner ends of said fins and the cylindrical face of the'carrier to prevent the substance being evaporated from being scraped off the carrier by said fins. This leakage, however, is attended with an advantage in that the wire-drawing of the air increases the evaporation of the liquid.

The fins not only form means for directingthe current of air across the fluid being evaporated, but also serve as radiators to conduct the heat from the heating chamber to a point closely adjacent the fluid. I desire to'lay emphasis on the novel feature of having the carrier C moving the substance to be dried in one direction, while the air moves in a path at an angle to the direction of movement of the carrier. As heretofore stated. there are a plurality of units in the shell S distributed about the surface of the carrier C, cachmf the units being provided with its own individual air-supply D D, D, D D", D, D and D which are arranged at an angle to the surfaceof the carrier C so that the air is blown directly against the surface-of the substance being dried. and the latter successively passes fresh supplies of dry air as the carrier revolves. The means for supplyingair to the inlets of the different units will be presently described. a 1

Referring again to Fig. 5, it will be ob served that the air. after passing through the spaces between the tins of each unit. will pass over the edge of the carrier into the interior of the shell from which it may be withdrawn by suitable openings to thc oulcr air, but 1 preferably providc a stack ()l) by means of which the damp air passes oil".

' T will now proceed .to describe the mcaus' for supplying air to. the inlet ducts D. D". D D D", D, D, this means being shown in l*igs. l and 2. and bcing preferably in the form of an injector ventilator. although I do not desire to be limited to such construction. In said Figs. 1 and 9. I is an intake duct passing through a larger-putbeing connected to the shell S by an outlet duct OD.

The pipe ID, referring particularly to Figs. 1 and 4, is connected to a manifold or pipe M to which is connected the outer ends of the inlets D, D D D*, D D, D", D? whereby air passing down the inlet 1 and pipe ID and manifold M will pass through the air supply pipes just mentioned to the several heating and air distributing units in the shell. The manifold M is provided at a point above and belowthe pipes D, D D D D D, D, D with dampers A, B, respectively, and, connecting the manifold M with a refrigerating chamber M, is apipe P, the arrangement being such that by opening the damper A and closing the damper B the air from the pipe ID will flow directly through the supply pipes to the air supply units, but. if the damper A. is closed and the damper B opened the air from the pipe-ID will then flow down the pipe P through the refrigerator M and then the manifold M through the air supply pipes-to the shell S.

The object of dampers A. and B is to make this apparatus, operative in any kind of weather. In warm dry weather damper A would be open and damper B closed, as illustrated, and the outer air would pass directly through D, D D, D*, D", D", D, I) over the carrier and out. In damp weather, however. damper A is closed and damper B opened. The air will then pass down bypass P into a suitable dry air niachine such as the refrigerator M and then through damper B and over carrieras before,

the illustration of which would be .confusing, although any pipe fitter experienced In the case of heating medium, a coinplica 'tion 0t pipes and valves are requlred, and

in the art could make the proper connections without"drawings and with instructions as.

follows: In cold, dry weather provision may be made to'heat the heater by steam. In warm. damp weather a vapor or ammonia compressor should be connected so that the vapor is compressed intothc heater H, which would be coolcdby evaporation and the air passing through the apparatus. The vapor shall lhcn bc passed through a'rclicf valve into cx 'mnding pipes. over which in turn thc damp air is passed which is to beused for drying. 'lhis would to agreat extent absorb all thcinoisturc ol' the air before it goes over the carrier The expanding pipes arc in turn connected to the suction end of the compressor. so that the work performed by this compressor is the evapcrating of the fluid passing over the carrier, and the drying of the air to accomplish this result.

Let us assume the machine is to be used for evaporating milk. I do not confine myself to any method of getting the milk onto carrier C, which may be dipping into the fluid itself or may be sprayed on. WVhat I have shown is a pan attached to the shell S and the top of which is provided with the same novel arrangement of radiators in combination with a heater as heretofore has been described. and in order not tohave the radiators dipping into the fluid or the space between the radiators and the fluid too great, I provide a means for keeping the fluid at a desirable level. One end of this pan has therefore an opening, provided with a means so that an air-tight connection can be made between the milk can K and the pipe 7c, which is adjusted so that the milk is maintained at a constant height. The shell S is furthermore provided with bearings which aline a. shaft 0 parallel with the main shaft of carrier C, and which has a number of glass disks G mounted thereon, and the object of which is to throw the milk onto the carrier C by virtue of centrifugal force, it being revolved when the apparatus is working.

The carrier C moves in the direction as indicated by arrow and the milk which adheres to the surface of the carrier is dried and later scraped off at X by means of scrapers. The speed of said :arrier should be adjusted so as to conform with the degree of moisture desired in the, residue at X.

In order to confine the air to the surface.

of the carrier so that the full benefits thereof in evaporating the substance can be had, I preferably form the side edges 'of the carrier with outwardly-extending flanges C which overlap the ends of the radiating and air conducting fins or plates.

What I claim and desire to secure by Letters Patent of the United States 'is:

1. In an evaporating apparatus, a travel ing carrier adapted to receive the substance to he evaporated, and means for passing a current of air back and forth across the substance in direct contact therewith and transversely of the carrier.

2. In an evaporating apparatus, a rotatable cylinder adapted to receive on its surface the substance to be (Waporated. and means for passing a. current of air back and forth across the surface of said cylinder.

3. In an evaporating apparatus, a. traveling carrier adapted to receive the substance to be evaporated, and means for passing a current of air back and forth across thesubstance in direct contact therewith and transversely of the carrier, said means comprising a wall adjacent said carrier, and provided with a plurality of plates secured thereto and arranged with their inner edges closely adjacent the said carrier.

4. In an evaporating apparatus, a traveling carrier adapted to receive the substance to be evaporated, and means for passing a current of air back and forth across the substance in direct contact therewith and transversely of the carrier, said means comprising a wall adjacent said carrier, and provided with a plurality of staggered plates secured thereto and arranged with their inner edges closely adjacent-the said carrier.

In an evaporating apparatus, a traveling carrier adapted to receive the substance to be evaporated, and means for passing a current of air back and-forth across the substance in direct contact therewith and transversely of the carrier, said means comprising a wall adjacent said carrier, and provided with a plurality of plates secured thereto eX- tending transversely. of the direction of movement of the carrier, and arranged with their inner edges closely adjacent the said carrier.

6. In an evaporating apparatus, a traveling carrier adapted to receive the substance to be evaporated, and means for passing a current of air back and forth across the substance in direct contact therewith and transversely of the carrier, said means comprising a wall adjacent said carrier, and provided with a plurality of plates secured thereto and arranged with their inner edges closely adjacent the said carrier, and means for heating said plates.

7. In an evaporating apparatus, a traveling carrier adapted to receive the substance to be evaporated, axheating jacket surrounding said carrier, and a plurality of plates connected to said jacket and arrange-i sansversely of the direction of movemer: f the carrier and means for supplying air between said plates.

8. In an evaporating apparatus, a traveling carrier adapted to receive the substance to be evaporated, a receiver for said substance and centrifugal means for throwing the substance from the receiver onto the carrier.

' 9. In an evaporating apparatus, a traveling carrier adapted to receive the substance to be evaporated, a receiver for said substance and centrifugal means for throwing the substance from the receiver onto the carrier, said means comprising a plurality of revoluble plates dipping into said substance. in the receiver.

10. In an evaporating apparatus, a traveling carrier adapted to receive the substance to be evaporated, a shell inclosing the carrier, a halting chamber in the shell, and means for causing a current of air to flow in contact with said chamber and in direct contact with the substance to be evaporated.

11. In an evaporating apparatus, a traveling carrier adapted to receive the substance to be evaporated, a shell-inclosing the car-- rier, aheatingchamber in the shell and inclosing the carrier, and means for causing a direct current of air to fiovv in contact with said chamber exterior thereto and in direct contact with the substance to be eve-p orated.

12. In an evaporating apparatus, a traveling carrier adapted to receive the substance to be evaporated, a shell inclosing the carrier, an internal wall concentric: With said shell and spaced therefrom to form a heating chamber, and plates connected to said- Wall and extending transversely of'the path of movement of the carrier, and means for supplying air between said plates,

13. In an. evaporating apparatus, a traveling carrier adapted to receive the substance to be evaporated and a plurality of units adjacent to the carrier, each of said units being constructed and arranged to pass a current of air over a defined portion of the substance-carrying surface of the carrier and in contact with such substance.

14. In an evaporating apparatus, a rotatable cylinder adapted to receive on its surface the substance to'be evaporated and a plurality of units adjacent the surface of the cylinder, each of said units being constructed and arranged to pass a current of air over a defined portion of the surface of the cylinder.

15. In an evaporating apparatus, a rotatable cylinder adapted to receive on its face the substance to be evaporated. and plurality of units adjacent the off the cylinder, each of said units being censtructed and arranged to pass a current air over adefined portion of the surface of the cylinder, and transversely thereof.

143. In an evaporating apparatus, a travelin carrier adapted to receive the substance to be evaporated,-and a plurality of units adjacent the carrier for causing individual currents of air to flow transversely path of movement of the carrier, each u comprising aph-uxlity ct plates arranged cause the air to take a circuitous path a the'carrier, and nieans for'feeding e'ach'unit.- r A 17. In an evaporating apparatus, a ing' carrier adapted to receive the substance to be evaporated, and a plurality of units adjacent the carrier for causing individual currents of air to flow transversely of the path of IIHOVQKLGHC of the carrier, each unit comprising a plurality of plates arranged.

to cause the air to take a circuitous path acrossfthe carrier, means for feeding air to each unit, and means for heating the units, Signed at New' York, in the county! of New York and State of New York, this 23 day offNoveinber, A. B11909.

' JOHN H. FE'DELER. Witnesses:.

3L. HOWE, 'W. C. RossMAN. 

